I don't think the 3270PC was what Mike meant. There was a PC with a couple of boards in it that became a self contained machine running the 370 instruction set. It was intended as a 3270 variant, though - developers would download their code to the PC, debug it on the local processor, and upload the next version, freeing the big machine (of which many companies had only one, after all) for users who wouldn't grab oodles of processor time with an incorrectly terminated loop or whatever. I, like Hans, have never come across one of these, although I heard of them back at IBM in '85 or '86. But I recall a rumour from another source that the 370 emulation was based on the 68000 circuitry but with custom microcode. These machines would run VM but not MVS, I think. Philip. ********************************************************************** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This footnote also confirms that this email message has been swept for the presence of computer viruses. Power Technology Centre, Ratcliffe-on-Soar, Nottingham, NG11 0EE, UK Tel: +44 (0)115 936 2000 http://www.powertech.co.uk **********************************************************************